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First identify which problem you have: stuttering or frame drops while you remain in the match, or a multiplayer connection error that disconnects you or prevents you joining. They can happen at the same time, but they are different symptoms and do not prove a shared cause. Check Ubisoft’s live status, note any exact error code, then follow the matching troubleshooting route.
Start by separating performance trouble from connection trouble
Before changing settings, note what happens and when. Does the game become choppy while you stay connected, or does it freeze and then disconnect? Does the issue happen in every mode, only online, or also outside matches? Record when it started and whether that was after a particular update. These details help distinguish a game-performance problem from a lost server or anti-cheat connection.
- Performance symptom: frame pacing feels uneven, FPS drops, or the screen briefly freezes while you remain connected.
- Connection symptom: you are disconnected, cannot join online services, or see an error code.
Reports of online-only or post-update problems are player observations, not proof that an update or connection issue caused a particular player’s stutter.
Check whether Ubisoft services are having an issue
Open Ubisoft’s Rainbow Six Siege service-status page and check the live PC status. Ubisoft’s page showed “No Issues” for PC in a snapshot last updated October 5, 2026 at 7:24 PM, but that dated status does not establish whether services are working now. Refresh the live page when you check.
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If Siege shows a multiplayer error code
Write down the complete code before troubleshooting. Ubisoft identifies these two codes as different connection losses:
- 0-0x00001001: lost connection with BattlEye.
- 0-0x00000204: lost connection with the server.
For these errors, Ubisoft’s listed first response is to restart the game. If the problem persists, follow Ubisoft’s current connectivity troubleshooting guide. Ubisoft’s code-specific entries were updated September 16, 2026 for 0-0x00001001 and September 15, 2026 for 0-0x00000204; confirm your displayed code rather than applying advice for a similar-looking error.
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If you cannot connect to online services
Use Ubisoft’s PC connectivity guide for difficulty connecting to online services or slow connection speed. Ubisoft distinguishes connectivity trouble from trouble running the game and advises contacting Ubisoft Support if connectivity troubleshooting does not resolve the issue. The specific instructions can change, so follow the current guide rather than relying on old router-setting advice.
If practical, you can also test a wired Ethernet connection in place of Wi-Fi to see whether the connection symptom changes. This is an optional diagnostic comparison, not a guaranteed fix for disconnects—and it is not a supported fix for in-game stuttering.
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If the game stutters or freezes while you stay connected
Use Ubisoft’s general technical troubleshooting guide for trouble running the game, rather than treating every frame drop as a network problem. Ubisoft’s support guidance says missing or corrupted dependency files can cause crashes or performance issues and recommends verifying the game files. That check is relevant to those file-related issues; it is not a guaranteed cure for every stutter.
If Ubisoft Anti-Cheat’s installation is corrupted, Ubisoft describes repairing or reinstalling Ubisoft Anti-Cheat. Apply that guidance when the anti-cheat installation is the issue; it is not a general performance tweak.
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What to send Ubisoft if the problem continues
A clear report makes a persistent issue easier to investigate. Ubisoft’s bug-reporting guidance recommends including:
- The route or actions that lead to the problem.
- What you expected to happen and what happened instead.
- Steps to reproduce the issue.
- Any workaround you have found.
- Images or video showing the problem, if available.
Include the full error code if there is one, and note whether you stay connected, which mode you were playing, when the issue began, and whether it also happens outside online matches. Use Ubisoft’s bug-reporting guidance or contact support through Ubisoft’s site.
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